The quote is a fabrication, not only not Morgan, but not from the banking industry at all.

The original Manifesto, or as it was called "Wall Street Letter", was published in the Chicago Daily Press of March 21, 1892, "found" by a T.W. (Thomas Westlake) Gilruth, People's Party speaker and writer, some-time newspaperman, real estate broker, and lawyer.

A full account of this is available online in the Southern Mercury, Dallas, Texas, Thursday, November 15, 1894

http://texashistory.unt.edu/ark:/67531/metapth185587/m1/1/zoom/

The account was called into question by multiple contemporaneous sources, including The advocate and Topeka tribune. (Topeka, Kan.), 07 Sept. 1892. and 14 September, 1892 (the second instance occurring as Gilruth's name was misprinted in the first):

http://texashistory.unt.edu/ark:/67531/metapth185587/m1/1/zoom/

"The Great West and one or two other exchanges reproduce the Chicago Daily Press fake purporting to be a Wall street circular. The thing originated in the fertile brain of F. W. Gilmore [sic: should be T. W. Gilruth], who held a position for a time at the Press. He has been challenged time and again to produce the original if it is genuine, and has failed to do so. The thing is a fraud and so is its author, and neither of them is worthy of the confidence of the people."

Also in the Barbour County index., July 06, 1892, p. 1.

http://chroniclingamerica.loc.gov/lccn/sn82015080/1892-07-06/ed-1/seq-1/

Multiple other internal aspects don't check out. The purported signatory, an "H Zimmerman", and his organization, the "Bankers and Brokers Central Committee of Chicago", and a mentioned bankruptcy of "Murrits & Co." or "Murris & Co." leave no historical record.

Later appearances claim publication in the the March, 1892 edition of Banker's Magazine. Archives are available and "The Bankers' Magazine and Statistical Register - Vol. 47 (July 1892 to June 1893" shows no record of either the Manifesto, Murrits & Co. receivership (among the elements that are conspicuously recorded are bank's bankruptcies), etc.

http://www10.zippyshare.com/v/gd7XDfty/file.html

More detailed documentation at "J.P. Morgan and the Banker's Manifesto of 1892 Hoax"
https://www.reddit.com/r/dredmorbius/comments/39w8u4/jp_morgan_and_the_bankers_manifesto_of_1892_hoax/